Difficult or impossible to control or restrain: irrepressible laughter. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "irrepressible" in a sentence
"You often hear someone described as irrepressible, so why is no one ever called repressible?"
"The scaling him with chairs for ladders to dive into his pockets, despoil him of brown-paper parcels, hold on tight by his cravat, hug him round his neck, pommel his back, and kick his legs in irrepressible affection!"
"Job's outward calamities affect his mind. poured out -- in irrepressible complaints (Ps 42: 4; Jos 7: 5)."